Film winding mechanism



,1943. I. SERRURIER 2,325,885

FILM WINDING MECHANISM Filed Jan, 51, 1941 if I 6 0 I 2.9 I0 I u InvelzZ'or.

[wan Serra/den of Fig. 2; and

Petented Aug. 3, 19143 2,325,885 V I MWI MECHANISM iw mserriirier, LosAngeles (7alif; I Aiwlieeiifln a a y 315 1941, Swami; 376 765 I 4 Claims.

This n n on. ates eenerellyto film Winding and n ng de iees pa ti u r yapplieer ble tofilm viewing machines of the WEE diSGlOSed in my priorPatentNe, 1,378,35, or teeny sitnation in itmdesirafble todrivee-filmin' reverse directions between-Awe filmireels. 1 Film viewing machinesof the time mefitioned are often used for inseectio i of: motionlpicturet lm prior'to ns m antimeontlsu ciiwork, it become nec s ary tback the. film up. free quently in order to permit reeinspection of someparticular portion of th film. ,Ihe tekeeup and supp e f fiheii m musrev rse the r functions for reverse drive of thefilm, the supply reelbecoming. a 'take u 'ree endtii 'talkemp reel e omin a supo yireel,Meohines'desiened to,

- do thi ereknpwn. They have, however, been u de d y rtaindisadvanteeeeus arreneements." For example, the machine disclosed in myaforementioned patent employs constantly applied spring: actuated brakeshoe bearing on the reel spindle; serves the purpose of tioning' as asupply reel." Thisbrake shoe, however, remains-applied while the reel istalking up film, at which time the'spindle should be as free opreventing verrimning of the reel whenfuncas possible, Another knownmaehinehes the reel 7 spindle spring pressed constantly against abearing-With the result thatjtliief spindle is again bound rather thanfree runnihgiiwhen "functionine as t ke-up reel. l .7 The object of thepresent invention is to provide a film Winding device which permits freerunning of the reel spindle when the .reel is functioning a a takeeup'reel, mid which instantly applies a light frictional braking action toprevent over 'uniiing when the reel funetionsas a uppl r e -p i V i Th vn ion will be best understood from the following detailed description ofapiesent illusr trative embodiment thereof, refei'enee for this purposebeing bad to the ascempenyin'gdrawv ing, in which: 7

i Fig. l is a side elevation oi-Va film viewing: ma chine ofconventioneli'type equipped with the;

present invention 7 Fig.2 is 2, section on line 22'0f Fig; 1; Fig. 3 isa transverse section token'on line 33 Fign i is a trarisvei se sectiontaken on line-4 4' of Fig. 2.

1 a film viewing machine of the-type fully disclosed in myP-etent N0,1,873,311 is designated generally by numeral; i8; tl is ma 7 so that-oneWill-im m jibe tbeefu r etions es o telizewup reel-'1 .20

12, an th be n thi sd d lllQllfiii the m chine between sea-reamsindicated T reels Land l2 are on spindles l3 and 4, s 1 p. p r ed i25ire-m ta 55; we e edr en rom pulleys J en -ii; el peetivelm oe i ei d byd v n el s l8 and? Withle dri nsip ile We, The Y et er s'driven reue eess not h wn) so e te nedin gear box 35 from a pu ley ,i oneeqted b te 2ith'mm y 25S {QYL' theshe t 24M an electric drive motor (r ot sl ownl'.i l

i i 'i a se on teke'e hrone eel spi dle or supp y s e .Hiitw fl ound od.l WE E Q' the ss m er .tecti n ake threue t e; ee :sp ndi M 1 7 l we el2 2 would appear similar to Fig. 2, the indingdeviees for the two.reelsbeingexeet"counterparts 9i n ee the exe tior e 1 in Jbshing'ZlSl-set into bearing 26, the latter I a i e imin eiellv fo med er ins e k .21 cqnnee e l at is i th l ieme aft-the" machine (see Fig1:). The portion 15a ofseirgdle 53 pro iee ieeef om the en 0i e ing iada t d to suii Qr-iia c nventioneli el such s i, a key Z3 te lthe'se sle being adapted to age t keyiwey in the r el to p eventeletive rotation2 betweeris indlean e A el r 3% s t 5 1 s in e t? 's i e :t nd o ea in25 we e eie v. wit later dewih d m ns t confine w hejspi dle a ain t x amovem ntwi h e e encento tlie hearing 0'4; theothet eiqid of bearin .35i n en eisees t o 2' pporti s I a. race ring iiifgr'bee ringbaHsEi-thelettervro' V i eeporti s t e efotemen ned pu l yvlt as here ShQWlfi eiigoging a split outer} reee ring si' i piiy mou ii d insidfi-l i lleylei Pulley at is fmmedwfith v-groove'afi for he drive-belt l'8.- Pulleyis t s r ta sbly me i n em ediend' t n 32e e 'si6- .fii rreli diee p dleHi e' i ;ietol et wheeltiL- Whifih is. relatively rotatable-I on aheariiigsleeve M secured tonspindle liies bvpinfllyand iormedadjacent-the end of beer- 25 "with an outwa rdly, extending annular@flang or disk. 3" ti "th s d s .4 h o-L.

ees-ate w tiiz e'e lle ,30 onit p nd e to '7 emi rie id spindl a a nstaxial movement wit :reletion t earinsfliw Between di k at; m flat. e68 bh Whee 0' s a 'ctiondisk. 45 ff i 0rv theiikei her side ef'retohetwltielldil, and bear-1 tfor' left reversal, p Y supp ye wh n i As'shewnbest-i i Fig; 2, spindle l3 is iourealed engage washer '48.

which engages in a longitudinal spline-way 59 formed in hub 4i. Washer48 is thus'splined on hub 4|, and is therefore axially movable butnon-rotatable with reference to spindle [3. may be regarded as splinedon shaft or spindle l3.

A coil compression spring 52 encircling spindle l3 and supported by nut53 andlock nut 54 exerts pressure against a washer 55 which is slidablymounted on spindle l3 and is formed to A cover plate 56 secured to theinwardly extending annular flange 36 'on the end of pulley [6 has acentral aperture 51 which clears spring 52 as well as the washer 55. Thespring 52causes ratchet wheel! to be frictionally clamped betweenthemembers 43 and 48, which arenon-rotatable on spindle I3. 'At-.

ratchet wheel 40 by means. of a spring 6| also: mounted on pulleyflange-3B. 'Mount'ed onthe stationary innerrace-ring 33 is a pawl BZWhich is pressed against the teeth of ratchet wheel 45 by a spring 53supported by rin'g 33. As illus-,

'tr'ated, the ratchet wheel-4H is made of sufficient' width toaccommodate the two pawlsffill' and 62, and the latter are spaced fromone' an'other so as not to interfere in the operation of the 'device.

Assume first that thefilm isbeing driven from lower reel l2 toward upperreel H,- the latter friction disk 41 is a flat disk or washer 48 whichhas set therein a radially disposed pin or key 49 all braking or bindingforces are removed from the spindle [3 that carries the reel, so thatperfectly free rotation'is secured-a feature which, insofar as I amaware, has not been heretofore attained in mechanism of this character.

It will be understood that the drawingsand description are forillustrative purposes only, and

that various changes in design, structure and arrangement may be madewithout departing from the spirit and scope of the invention or of theappended claims.

I claim:

1. A reel driving mechanism comprising a shaft bearing, a shaft mountedfor'free running rotation in saidbearing and having portionsprojectingfromvboth ends of said bearing, one projecting portion of saidshaft being adapted to carry afilm reel, a disk fast on the otherprojecting portion of said shaft, a disk splined on said shaft at aposition located on the opposite side of said first mentioned disk fromsaid bearing, a ratchet wheel surrounding said shaft betweenlsaid disks,a head on the end portion of said other projecting portion of saidshaft, a

' spring acting between said head and said splined disk to frictionallyclamp said ratchet wheel between said two' disks','said shaft acting intension between said first mentioned disk and said head to resist thepressure of said spring, a pulley functioning as a take-up reel. At suchtimes the I pulley l6. willbe constantly driven by the belt.

l8, the directionof rotation being in the direction of the arrow in Fig.3. Pawl GD carried by pulley l6 engages ratchet wheel 40 and drives itin the same direction. The ratchet-wheel drives spindle l3, andtherefore the reel ll, through friction washers 45 and 41 and members 43and 48, any necessary slippagefowingto the growing diameter of the rollof filmon the reel occurrin mounted for rotation on said bearing, pawlmeans mounted on said pulley drivingly engageable with said'ratchetwheel for one direction of rotation of said pul1ey,.and pawl meansmounted on said bearing engageablewith said ratchet wheel when the shaftis rotated in a direction thereverse of said one direction,-all in'suclixmanner that frictional slippage occurs between thespring clampedratchet wheel and said disks insaid reverse direction cfrotatio'n of theshaft, while all spring pressural" restraints to rotation of theshaftare removed when the pulley is driven in the first mentioned directionof rotation rotation in said bearing and having portionsprojecting'from,bothendsof said bearing, one

' projecting portion of said shaft being adapted between ratchet wheel40 and the members-'43 and 48. At such time, the spindle i3 is perfectlyfree-running, all braking action or other pre'ssural restraints torotation being removed. Y i 'For the other direction 'of film drive,that is, from reel H jtoward reel l2, the pulley IE will again be driven*by belt l8, but'in thereverse direction, so that the pawl 50 carried bythe pulley does not at this time drive ratchet wheel- 48. The reel onthe spindle l3 will at this time be rotating. in a direction tounwind'the film,

the reel and spindle rotating in the direction of V the arrow in Fig. 4.At this time, the teethof to ,carry a"'film. reel, a friction clutchmember fast on the other projecting portion of said shaft, a frictionclutch member spl'ined on said shaft at a position located'on theopposite side of said I V first mentioned friction clutch member fromsaid ratchet wheel 40 'will engage the stationarily mounted'pawl 62,which prevents rotation of the ratchet wheel in such direction, so thatfrictional slippage must then take place between the ratchet wheel'andthe membersv 43 and 43; The friction between the described slippingmembers constitutes thebrakingforce-utilized to prevent overrun'ning ofthe reel under such conditions.

This friction is adjustable byadjustingthe compression of the spring bymeans-offnuts 53 "and. 54. Thus a frictional drag is exertedbnthespindle l3 carrying the feel; when th'ere'el functions as a supply reel,but'this frictional drag bearing, a member rotatable about'saidshaftbetween said .two friction clutch members, a head on the end portion ofsaid other projecting portion of said shaft, a spring actingbetween saidhead and said splined friction clutchrnernber to press said 'splinedfriction clutch member toward said first mentioned friction clutchmember and frictionallyspring clamp said rotatable member therebetween,said shaft acting in tension between. said fast friction clutch memberand said head to resist the pressure of said spring, a pulley "mountedfor rotation on said bearing, ratchet means 'acting between said pulleyand said spring clamped member to drive said member for one is removedwhen the reelacts' as atake-up reel.

And when the reel i'sacting as -a take-up reel,

direction of rotation of the pulley, and ratchet means acting betweensaid bearing and said spring clamped member acting to arrest rotation ofsaid member when the shaft is rotated in a direction the reverse of saidone direction, all in such manner that frictional slippage occursbetween the spring clamped member and said frictio'n clutch members insaid reverse rotation of the shaftwhile all spring pressural restraintsto rotation of the shaft are removed when the pulley is driven in thefirst mentioned direction of rotation. 1 a

.3. A reel driving mechanism comprising a support, a shaftbearingfsupport'ed by said support,

a shaft mounted for, free running-rotation in said bearing, and havingportions projecting from both ends of said bearing, one projectingportion -of said shaft being adapted to. carry a film 'reel, a frictionclutch member fast on the other-projecting portion of said shaft, afriction clutch member splined on'said shaft at a position 10 port, ashaft bearing supported by said-Support,

a shaft mounted for free running rotation in said bearing and havingportions projecting from both ends of said bearing, oneprojecting-portion of said shaft being adapted to carry a film reel, afriction clutch member fast on the other projecting portion of saidshaft, a frictionclutch cated on the opposite side of said firstmentioned friction clutch member from said bearing, a mem- 1 herrotatable about saidshaft between said two friction clutch members, a,head on the endportion of said other projecting portion of said shaft, aspring acting between said head and said splined friction clutch memberto press said splined friction clutch membertoward said first mentionedfriction clutch member and frictionm-ember splined on said shaft at aposition 10- catedon the opposite side of said first mentioned frictionclutch member from said bearing, a

member rotatable about said shaft between said two friction clutchmembers, ahead on the end portion of said other projecting portion ofsaid shaft, a spring acting between said head and said splinedfrictionclutch member to press said 'splined'friction clutch member toward saidfirst mentioned friction clutch member and'frictioni ."ally spring clampsaid rotatable'member thereally spring clamp said rotatable member therebetween, said shaft acting in tension between 7 said fast frictionclutch member and said head to resist th pressure of said spring, arotatable pulley surrounding said shaft, ratchet means acting betweensaid pulley and said spring clamped member to drive said member for onedirection of rotation of the pulley, and stationarily mounte ed'ratchetmeans carried by said support and between, said shaft acting in'tensionbetweensaid fast friction clutch member and said head to resist, thepressure of said spring, a hollow 1 pulley rotatab-ly mounted on saidsupport, said hollow pulley surrounding said shaft and substantiallyenclosing said friction clutch members and said member spring clampedtherebetween,

ratchetjmeans acting between. said pulley andv 7 said spring clampedmember to'drive said memher for one direction of, rotationof the pulley,

actingon said spring clamped member to arrest,

rotation of said member when the shaft is ro-g tated in a direction thereverse of said one direc said member when the shaft is rotated in a direction the reverse of said one direction, all in tion, allin suchmanner that frictional slippage occurs between the spring clamped memberand u said friction clutch members in said reverse rotation of theshaft, while all spring pressural restrains to rotation of the shaft areremoved when the pulley is driven in the first mentioned direction ofrotation.

, 4. A reel driving mechanism comprising supand ratchet means mounted onsaid support inside said pulley and acting .on said spring clampedmember inside saidpulley to arrest rotation of such manner thatfrictional slippage occurs be tween the spring clamped member and saidfric;

